Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ea7e1238ef27dff4d48bd01522e221361e406f65930d4e6e3df74ebbb344e7c6' 
  AND token = 'Vo6lbBeNAjqCmMFakC8F48rfmrSHbtgiUvpeNI4hEag=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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