Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9bf8f4fb107ed78919407ab75a5c1a2ea28387ab95cf01e63e36e85ffc3b0dda' 
  AND token = '3HaT0lUKe1u1V6iVsJfCpEyuZNAV/yKY1zo17ICvJJM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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