Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '13ea5b94e932d46c181cf5c15c15786c09c0f7ba525a9239f465a7e3a29f5e65' 
  AND token = 'r+d2thrkMPGkSrNywIL4SgdCeachTA+SB21ucEVJ85s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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