Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '6a096d0add05163129115f41bd955ec95494dfd5454b5e2c6f761aa93f01dfa3' 
  AND token = 'QrSfDsN8O/tCbajN6NQ/rgWUsT5VEV0LYsaS51o+UEU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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