Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '958946e90b165db0234a0359503600f1235efe0423bf52e02bac19f6c2401698' 
  AND token = 'iWab03AcTn4zCcOWywEKSGZ3IY9LCu+5JdTqjHFiljQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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