Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c22e20cc37a6f89d60f44bf808dfaf24f3fbe878dd6d6ad82e0de9a79fb5f065' 
  AND token = 'qmD5C7G/izNHsZwtUTZp/tI2kjq5D72t4KK2Q/afU4U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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