Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fc978bb3cd217961f7e4c09e0115e65c88210c57cd6eb08b1e5f81e7cf32768f' 
  AND token = 'ZrLY6p3cvkwRamVCT3B7Bgk7geb49ljUK7ySBtzUCGA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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