Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6b7c9485b55f6201479bf6a6c7e1a17e82efd183bd880ec9c8f69338dc6a12ce' 
  AND token = 'o2+AsYStjwMRCGjVSIogHSkfQESdA+rxt5nMQjI8R6w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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