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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bba40c93275e20946415776e8d7dc95b8b1a68fef6d39f8685c4b93bafb48ef7' 
  AND token = 'k0R/os9nce+ftWigLtjav/jq0U5grGyVPr/QqFElf6A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}