Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd0230f648f043c61061931f9235b3fc75806380a1e1b0b0d129244b295739840' 
  AND token = '8Kgaw8ay+A2XTuDxjqAJDknU/SUOp5E494yEEKWnmx4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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