Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ecf2787b5e9338c0d4b6f3dadce2d29438f2fb2f6cb0706a6530a6513cc7b0f2' 
  AND token = 'tt0oP+TZhryOkctakRGJ8zTiqivBAuL/cgOcPBwr7nE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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