Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a0566b9a64831b1c2b962771e54e0f9a47e9ecddd5dbeefbdd0943baffc99248' 
  AND token = '2vNKAaGqanSTzdTCfcPlpfH1r9yvG/ll8CFTxkzf/ow=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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