Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a2e086f7f4cad61b851535237abc13a108fc53ee3e04f2b6d54cd2bbfd6ead65' 
  AND token = '4ZhfuFKBtpDa2U2jrplcE3AjkkRggrPKpLyrIdAgl4A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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