Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '19273abf04d0eceedf856c32980518d29b46cdf11f0e46df7c94a7a7c71c178e' 
  AND token = 'pmcLhMcUSNwF14YF1M5mapO9jxdHycXq8nPh7lii0Dk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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