Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1255bdbb90af9b0b6816520b60602a5573305fed605a4902f2644451cb0d90cc' 
  AND token = 'mri/+J7s9mu/lcBT2+x+yKfZdkVwHBSexyiAEqtAHn4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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