Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2476d8fb1310f0e0153f2eec380fd61eb8c9f162585fb2a17b8a02a348c90738' 
  AND token = 'QVezCG33yCmyi+1n6geA8qX2VCsXOjVpXPOEQgyzarI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00055

JSON explain

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