Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e17438697eff09342ce4b6445cc3d1934258f7392fdd5c55015ef8f619d46aff' 
  AND token = '+xCpkoyFJ6CdEry0JJ7fPVkyMRWlKwwfgrjnfMpcz10=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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