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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '058539f94789fad4c90d9539d0ea26c5ebecf9cd9652c4b24acc8bc2b1de211e' 
  AND token = 'G9xWkh27zcexNgWsmnWsFp8ILjsdIPCnQb0yFEV8yHs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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