Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '08a72719dfea7a69e8c557eb165215c5b9c199259478d5a58013c897717869a1' 
  AND token = 'N3TFKF3A3NDcSLuXu0ZmUSd6txtjeQVjtlsm1azBOQo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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