Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '640cb00910a28fff253ef29d356167ef340e84ddeca1a5c99571f9d041d092b2' 
  AND token = 'g5hKTshm1Nuhn9bu/xcXfZmb7z58bmmqGAAywFZwvg8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}