Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ebcc6b40e94d57c6d1ea2a7d1a4c6a13fcec3efb21c899118f25112d60dcde0b' 
  AND token = 'hd3aA6FmQ22NpZcZG4qrLoSIbK4YFV2++H8VWbPokRU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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