Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f76187d39fdda91bf8b257c9a5626870ae8ff6f0b80ed195992d74ef37aa30ea' 
  AND token = 'Gzyeg1J/OxaHbMyO3Y8thImNzL/OnlBryDz3xjS1f40=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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