Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '56de8890892eb3cbd472148bcda2f5344102061a0ef81ba2b76f39b5e83e241f' 
  AND token = 'OH3xxwckNotZzsW+KGtW8SAbcEHWmnNEEOCLByBWMNE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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