Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5a77e4acbad8a0b7aab7a65a221a498f73e168dd8e6841114838c523ae37fc84' 
  AND token = 'pRnwImwJvVK/fVGH033fPHC2ZIGMJearT2fXiLsbIK8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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