SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd3829387434c5349b3184bc299f8a0d117102b58777614ab69641ce8d387adf7' 
  AND token = 'wPatYFqevqazg/2T9YX8SgfZVnDjI3KElndhvnOGYzg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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