Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bff6327e5f604655508f738b3c180a0ded211f3e16e138f7f726156113ce1133' 
  AND token = 'kZnXB4C/6JCGkVm2KCPrOrIXMuKTqEpmgoD2byJul+M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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