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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5195084ba56e26c22ffa2f28bf7ce19dcb1f868f3bb3ef8ce23f9302f1652c8b' 
  AND token = 'eeqpTEQFDIq7/n64cjufYO348gzCuc0dD72o0C7797Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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