Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '44dc692b3745c3789b08f2a2fd325c845d616e890fc2c68e8870c4a0fec8e50b' 
  AND token = 'Fl+CoKrqdn4UjSHpfjM9vXOp4o0DYduQSkdMKFfSlIg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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