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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '58d71f78bf40b3f1bc58abb54d31b8801eecf6e48ee72756aad3c9e5604f583d' 
  AND token = 'TSu67BArGD/gaQsWNriM8zeSJrJksGxaVhMO1BRmR8A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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