Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b1722055b88729ac75d48627ca59879f0d6555a29579f38ad759f9be450715fd' 
  AND token = 'ypUIW5URv38B2USWNeyjeua2iz5savWy6fhanStlYk4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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