Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '43e71d48538e363c35c38e73ab2f837bab2a0b631d533648273de91e8f208137' 
  AND token = 'NSk4PvkJ90LCh6xzMd1Q4o3z3vx+D1kA7awbE9F18jE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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