Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '89c6fce98a6d50e26ecff474a32355ea0f7925385dd0239edb2c53c01fe8ae83' 
  AND token = 'NWQjvHACJaSQB9y2bsZEzLTa90QZyiomBDFIbAlV95Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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