Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5316c3837698a54a2cb7de3232271752e5b921db5472368a1e133d5c60bd4969' 
  AND token = 'pSCAPmuY5ZNsugcnlPiDiQLvUThb5f/bkPqvZ1P1a9k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00052

JSON explain

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