Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '848e5e046d3adcb7c77fd00e0b40ccb30823dd84574341d7e1165841d1346ce3' 
  AND token = 'Va7sJFqKDYo/uOgaVkULyv0ksEDOBWfpbyiAjL86Nlk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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