SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '43efa2411d65ab8fa77ac08c4b54904b280616ce3203208c9b12d2bbbcdd8da6' 
  AND token = 'TYGMgxw1Rr0Obm4sWtzVu0i/BEmS0J+vtX1YHObzZSA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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