Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2318640f8cbc62272a153df00e678daee4285280c4293196f2066e1fee64ab0c' 
  AND token = 'Zgif3gERI77hsHPok8e+g/yr0puty4y0ltPI0BdL3Hs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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