Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c2e009f6450699523fead903086a6e57642ef570de1acdd4605912e0cd02987f' 
  AND token = '7/WKgyDxP3gQHZprFUmGZ2HbNWtugIZu1ZuEoOcZ7ac=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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