Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1a67789ae3a4d0e2809e00697f745ca185a7c83d6c97ba18227378649d035c92' 
  AND token = 'qOPLfeNaqiZBBSIZgXFEgSXteS8mcg2/sGScGFuTTn8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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