Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2eefe206d0465dfd85beff54998c0350c09c1af0291948d2bd4951aba6dd0211' 
  AND token = 'FW7VUz7OlAHCeNdra9RE2sKN+XHGtgo1QbpmpSYfCpQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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