Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '581430e28e7e5f3b9d9fec6260f4e3cca2d3adea6477454fdde14c2b43a81dad' 
  AND token = 'ECZQmK3MJup14rANEnN4WDOYFeRJb2KPfZM7d8Qyg80=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00063

JSON explain

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