Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd92c2b56357755dac6c1f9e9acc9b61c38719e27a2b1a668bfae3601b1e1d56e' 
  AND token = '/ITTQrORY/ayYNPre0tEhi7n0a08u18h1GWts3LAkD4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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