Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cf2db1237759021af68f1ab9c338d9ac5734b83d2efcf53da8faed08f7b3ac7f' 
  AND token = 'wFu01OlOm+QAdWiVwax2ZhuDVCJYt7df+GUCW8Skio4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00053

JSON explain

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