Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f9a4ba60a982aea0a02f526d916c7dd06a0aff24c2ab5ad5c4f617590e85d34f' 
  AND token = 'qLkvSp2NVOd/LwzS4V+Cex0Ry/A0rRvALVMnNbDzQFA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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