Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '95a9e65ef57e1434f5a6f60370d6aa81830ef93ae80800aa41928407d1979f3e' 
  AND token = '8hNT+mYsznHfeXoQiHha+shlefrHOcbty4GTQpbjm3w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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