Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7032f78b522d4546ac2e97feffd5dd94f82b57d6bcbf4053c4d55582eda86b1b' 
  AND token = 'mv0Ui02pMMqY5Q2bg77B7XNBEJjaDUoPmFG7jNvo2z4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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