Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '700c007cbd66a6f9c38515eb97a61a56afa4da70c0889cdb8307ad632b4eaee2' 
  AND token = 'r0g3ervHZJZ/m/PlIoR5p+pSq1dVx5mSG28SAoR+QRE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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