Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f068c5f6449e91e80f89c2dd2182d973d9202dda5446cb8c07d4ed164f189ca7' 
  AND token = 'O821l7OLtYBpnjrCnlGKly4Hz+rYWsnHZxK00aEzWJc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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