Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '79ad3122a478222ab66dbdfba7f43e849c81e253dfe4b9fedf0c2ae93ea7e235' 
  AND token = 'Aut4e4tAlw97W5aS3yTwkyvJeiZBFOmk7/O68WSbOek=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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