Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '72049bc0295e8103fab4c2f349eb7dc986e1904e39aff4d49705b9e3269b6b68' 
  AND token = 'JmOnjLGnKfBggm74Jfd9reZgHLCDbf2gaIyugRDqD5I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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