Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ce5f37fcc8dfa8ac06242ea1b6b3dc96e06c7e53b69b26c5bd8ea1b603912262' 
  AND token = 'VAcLD9m0UwMZtTutEWoy3vm+tVRM8mP/kNZ6CDk3R1Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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