Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ac4c202964dc1d956b9515276ef407b92d4020e1923e06f45eed92062dba3426' 
  AND token = 'BkTmHrl+CI5i0tuwfHv1bb4XxSPHIxx98x/yncx4dhw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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