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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9d075c7427dbc94e2dfcf43fdf85b1ef0671fe252a84cb8802381792189921d2' 
  AND token = 'KNkH9bnNyOkpYSmg+s/U+o8jrjiJ5sj0lE5YeHF5QDc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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