Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f2fee40ba941be8870165c2c88f2dca38d3560f594497e5c3ef765ad0896f95e' 
  AND token = 'G4P7Fmi9oF4UkOFTuWpDtJpO5RFOw0MUwKFrdr2fy/A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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