SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cc30b812f4165b7524baeb472fc05fa939fb53f7c7aa7ea57b31a4065e8ceaad' 
  AND token = '07TIk0TS/ltoFjOLqZjJYRTg3BrEMH6+2UQP8wg1DJs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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