Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0b5864351022a2d6d08425297d282d20931cd009c21c1973d7d5943336324b15' 
  AND token = 'aP7Q5/N3unM24hFgwfWOi4UNTJOvKMIFNPoD3V9vTms=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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