Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '738939a0061ee2d759b93c01912bf9f00ead7183100e23771b8ea37a6b0500b2' 
  AND token = 'UGGdT4wrbgLiLOB4FCfs4WiCrfGGz4WQiBjJEz/cozY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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