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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ca37cbfc6222ea8a64b8a14d0d049de1286fff788b79b9ac5e83b89a843d09a9' 
  AND token = 'fzJnbXdWyPDxS1QHT8XEm5W2lNUPuQAdnan64CQIriA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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