Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5f42bf80efa20ba1605f3abefbad1e49dbc0a6cb4bda16a1bc4863cc593b9a20' 
  AND token = 'Ktq9WJU503GsYgJJA2N7SR8a7ZkL7Q+dNESH03eaikI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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