Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1fad039a22a9ea37f0cc48c1f88d80a50fcc912c8ebd2b324d42cfb6cef6518b' 
  AND token = 'f+dNdRZfRBCfFRgJSR9p2pwNVYkO5TKmaNLpXOtxE4A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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