Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f155338fddaecf4e07e8aec5df75f99c87a8206efc88bc505d969bf10f80482e' 
  AND token = 'KGaDfbmHZ+dEFYAfxBWhN09IkI7FwXD1HBM3vj1vgkQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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