Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e879a76dcbeee9e3f8acbadf9a950dc19e777c0b7080e448dd95bb166a56e575' 
  AND token = 'GqsIjpA81zbE+jNkHEWdHuYx2qqc/bIsk44T0ngbh/M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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