Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6e26a055b79a416438a9daf8a22b03bca20396f567bc3c7ce3fe037a8a23545c' 
  AND token = 'hXn9T9wrRtCkU4VgV7E+tpupXNsBkK7oY56HlH/bWO4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00053

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}