Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '459711fc0773f250648fb9a65d720bab8ec4c6aeb07469ef19a7b6ff7ee092e4' 
  AND token = '+aBA/iXDMwT7Zh/8bzeYPyV/EnhZM7GSQBoq340KyOU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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