Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd343a195b8712051f4a9cf30cc7dc87a1138358522ecc68f60fc51f3d6352229' 
  AND token = 'PQ+qaokC9XAmu62SL7bDMUezAWxRPzWrDKEHRPNdyag=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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