Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '706d3c4a43ace91c48ca42f9d9b4530d721f4f79c0f7ae7b7deebba43bf67dcf' 
  AND token = 'nlr8DdtxMVGyOhJh6k5lOXf1Dud5kiKf4vlWI42i2RQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00054

JSON explain

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