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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9a9f808433656d7d275fae2e462c60f8e01c95df6414c77f2f5058c71f93f94b' 
  AND token = 'i9jVAE7LcK7X1IoUf9eA9W+KCpNCUqukTdbWHCc8DNw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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