Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8ffbf57f805ebd459d75e5ce1b1d0f68abd9367de69828e2163e393360f7f4b4' 
  AND token = 'I4QlCqkCnrwbr/bONffxXyH86yH+kzx2U4OsnUHOKsA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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