Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f53a7adf526c7597458943d0518f5cdb894ea53c9cbbd40d00df1b7c972a31b3' 
  AND token = 'mqLXcy5vdZZNz+LjkicJQl+yO+PPdWX+TyO50mCf6Xw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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