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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '27d76ef77086236f5e45ea01e880d6a19ce3dbdbdeea65b0eab9ece452c8e86c' 
  AND token = 'V097L2ugctA7MNNpMauq+HAVY0l9a+7opDbHG++VD6o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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