Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ac0d49d97ca187ff0445999a90fb618a1584282e39433e543d8110441601e8af' 
  AND token = 'Lp3oJJIVfv8fHZ4jhU9pBkkUYPRhIROqDeniENMl3QY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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