Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e4801643c15fdae84f176929d84c724fbc1f8e5de1590849378270cf15e8cbbd' 
  AND token = 'H4BFxlS4FKeAM9Zu6NbGx3SvfvdPA7gb1B7U2uq4T1A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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