Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4be274ce19393b5d61d266d17f674e5a7cc907ba967747c9a3d630b213cc3261' 
  AND token = 'eqFFzbvg+/DeCF0O++5lpZ5Hvz73HD9B2G4WrgoJwzQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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