Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '15347c629e8206ec2ef63ff0eba406ce52787182b7424dc22eaff8d6ab93ea74' 
  AND token = 'SOr1Cj4hMaxk3+XMKS92dOt895I395t/+USckhGzfAs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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