SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '33925e51abe87b758ff96e27f838347ba1d84e762730987983f61456db71dc27' 
  AND token = 'yxyWSQ+hVdwgONwJdNsXkYULM2higt/sKsYDJio1OoQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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