Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd956955053019ec3528b47414ac7b43d452c78c31d7b3874b929a305c5388292' 
  AND token = 'nMdK0NNYacd6E9O9TwOpXSfag4U9u2O5rLjupRDmiXY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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