Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd9139ac7ce4e0167fb5fe6712bd4016dd0d91759fc69cc8c1d787931209d5d30' 
  AND token = 'plG9Kz9PIGf4xZf+lLSnVsXwnxlRLrKRekfr/4j6X5g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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