Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '31f9b3d8eef93aa2b704e61b35365846de7b562e7221f482a8ae80d7dec01dfc' 
  AND token = '8KwW8nDqowdIcdCQUDLPMQeprFNmiYcsjWaI1oX0mHs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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