Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a991e4bd423e5bad52b4c1d63fe1f4ab7002214e10259e550532086f46039cc2' 
  AND token = '30ozg4jJkzJ/YmHuKLog7MXf6ePUGcKxR9FTB8u9EuA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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