Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4cb7dd20bf9c71669379e5e1db339294ca834f6ddbd272dd52c71708df02362f' 
  AND token = 'rIf3oh/OBKG8mXy05Smwcas2Uaa40psvrSYNBwYExF8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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