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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6662ee0fbf5d46c7c1b865efd0728e8b4c303cc6d3ead0f7ce70fd722e375ee3' 
  AND token = 'pOgmSB501QkK7AQGKz3ljOhoR3QbcUhGlylO7Z3y6xA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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