Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '334fe4e6fce0b72c7d7cba90b51b4b5b48d42ce163afe61328127d5d3618ffca' 
  AND token = 'IgUTpgYtM5fldEUOPBbLNLDiX8wARGBDO0pgGCdRdrk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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