Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd6437a37a375e1737b01e11e1f72c33a9ae18abb1c240474882da52858c12dc0' 
  AND token = 'TuC4OY9f0HlgS7SSEr2k5LCa7dwiVYns/Xdd9aYspo4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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