Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bc38c71b379637fd1a0d02ff2f2856aecfe68ff4686a3448eb2b562dfcd3848b' 
  AND token = 'lnee5H6GRk76tzygo2M/FnCuDbZPScvuXndHyf/sCb8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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