Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7c2ca65d8fbabb396d8e06c5ac30564657ea0e00ca58ed3fd89dd1051b0e4953' 
  AND token = 'CtS/Db3tktRG2LQVC4gz0vCuTTABj9HVwqb5S3rYlKo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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