Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'b0fdb9d1142b9a82c097dcbcaea789c6f97c6a06cc2e779e5f143c71f8ef2f54' 
  AND token = '8JKMIUBl2f6bjxK4z8FbsNTgqArBWDC3IeKNHart6Rg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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