Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '012a0614e15ea535775a01327b1a979b753b313c994fcec8ef98bd0a00cc23c8' 
  AND token = 'FjXnPzPa6k8R43eQjDgPZamI2KoPu7vJzZEoBOyoTJA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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